Isospin Dependence in the Odd-Even Staggering of Nuclear Binding Energies

Abstract

The FRS-ESR facility at GSI provides unique conditions for precision measurements of large areas on the nuclear mass surface in a single experiment. Values for masses of 604 neutron-deficient nuclides (30<=Z<=92) were obtained with a typical uncertainty of 30 microunits. The masses of 114 nuclides were determined for the first time. The odd-even staggering (OES) of nuclear masses was systematically investigated for isotopic chains between the proton shell closures at Z=50 and Z=82. The results were compared with predictions of modern nuclear models. The comparison revealed that the measured trend of OES is not reproduced by the theories fitted to masses only. The spectral pairing gaps extracted from models adjusted to both masses, and density related observables of nuclei agree better with the experimental data.

arXiv commentPhysics Review Letters 95 (2005) 042501 http://link.aps.org/abstract/PRL/v95/e042501

References in corpus (10)

• Nuclear Ground-State Masses and Deformations
• A New Parameterization for the Lagrangian Density of Relativistic Mean Field Theory
• Shell structure of superheavy nuclei in self-consistent mean-field models
• Pairing gaps from nuclear mean-field models
• Nuclear Ground State Observables and QCD Scaling in a Refined Relativistic Point Coupling Model
• Odd-Even Staggering of Nuclear Masses: Pairing or Shape Effect?
• Further explorations of Skyrme-Hartree-Fock-Bogoliubov mass formulas. II: Role of the effective mass
• Pairing correlations. Part 2: Microscopic analysis of odd-even mass staggering in nuclei
• Odd-even staggering of binding energies as a consequence of pairing and mean-field effects
• Pairing Gap and Polarisation Effects

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